481756161 has 4 divisors (see below), whose sum is σ = 642341552. Its totient is φ = 321170772.

The previous prime is 481756139. The next prime is 481756189. The reversal of 481756161 is 161657184.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 481756161 - 2⁹ = 481755649 is a prime.

It is a super-2 number, since 2×481756161² = 464177997322915842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (481755161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80292691 + ... + 80292696.

It is an arithmetic number, because the mean of its divisors is an integer number (160585388).

Almost surely, 2^481756161 is an apocalyptic number.

It is an amenable number.

481756161 is a deficient number, since it is larger than the sum of its proper divisors (160585391).

481756161 is a wasteful number, since it uses less digits than its factorization.

481756161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160585390.

The product of its digits is 40320, while the sum is 39.

The square root of 481756161 is about 21948.9444165317. The cubic root of 481756161 is about 783.9272463248.

The spelling of 481756161 in words is "four hundred eighty-one million, seven hundred fifty-six thousand, one hundred sixty-one".